Powers:Scanner was originally presented as having the ability to sense the presence and location of other mutants (but not their thoughts). This ability was psychic in nature.

She was later shown to have the ability to indefinitely project her astral form. She could appear instantly in any location she chose, or move at very fast speeds, communicate telepathically, and disrupt the astral forms of others while in this state. Her astral form was shown as being either visible or invisible depending on whether she wished her presence to be known.

While astral projecting, Scanner's body remained unconscious.

Later writers mistakenly presented her power as being able to transform her her body into an 'electro-transitional' form. Essentially she became a living hologram, able to travel at the speed of light.

Bio:Not much is known about the history of the woman known as Sarah Ryall except that she was a mutant with great anger toward humanity. She became one of the Acolytes who joined Magneto's Acolytes after his supposed death. She took on the name of Screener when she joined their ranks.

Notes:First appeared as Screener in Avengers #357 and as Scanner in Uncanny X-Men #300.
Scanner was created by Bob Harras and Steve Epting and first appeared (as Screener) in The Avengers issue 357 (1992). She was later re-used by Scott Lobdell and John Romita Jr when she appeared as Scanner in Uncanny X-Men issue 300.